Preheat oven to 400°.,Cut all vegetables into 1/2-inch chunks.,Toss potatoes, yams and squash with 2 tablespoons olive oil so all sides are coated.,Spread vegetables in a single layer in 2 shallow baking pans and put in preheated oven for 10 minutes. Toss onions and peppers with remaining oil.,Add to pan in oven; sprinkle with salt and pepper.,Roast until vegetables are browned and begin to dehydrate, about another 20 minutes.,Delicious hot or cold.,______